12499857 has 6 divisors (see below), whose sum is σ = 18055362. Its totient is φ = 8333232.

The previous prime is 12499813. The next prime is 12499867. The reversal of 12499857 is 75899421.

12499857 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12278016 + 221841 = 3504^2 + 471^2 .

It is not a de Polignac number, because 12499857 - 2¹² = 12495761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12499867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 694428 + ... + 694445.

It is an arithmetic number, because the mean of its divisors is an integer number (3009227).

Almost surely, 2^12499857 is an apocalyptic number.

It is an amenable number.

12499857 is a deficient number, since it is larger than the sum of its proper divisors (5555505).

12499857 is a wasteful number, since it uses less digits than its factorization.

12499857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388879 (or 1388876 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 12499857 is about 3535.5136826210. The cubic root of 12499857 is about 232.0785566810.

The spelling of 12499857 in words is "twelve million, four hundred ninety-nine thousand, eight hundred fifty-seven".